Leviticus 17:13-14

Any man whosoever of the children of Israel, and of the strangers that sojourn among you, if by hunting or fowling, he take a wild beast or a bird, which is lawful to eat, let him pour out its blood, and cover it with earth.

For the life of all flesh is in the blood. Therefore I said to the children of Israel: you shall not eat the blood of any flesh at all, because the life of the flesh is in the blood, and whosoever eateth it, shall be cut off.